21. The G20 will take ____ lead in building _____ new approach to cooperation.

   A. the;  a     B. the; /      C. /; the   D. a; a

22. You'll have to pay one month's rent in ________£¬plus a ________ of $500.

A£®advance£»check         B£®reservation£»cash

C£®advance£»deposit  D£®check£»deposit

23. Can you imagine________the work in twelve hours?

A£®he finishes  B£®him finishing   C£®him finish      D£®him to finish

24. This article is too long.You should______the unimportant details to make it shorter.

A£®find out  B£®pick out   C£®make out  D£®leave out